Method for managing security for card-type storage medium and a transaction apparatus therefor
First Claim
1. A method for managing security of a card-type storage medium having a storage unit keeping a data file therein comprising the steps of:
- generating an unique identifier in said card-type storage medium for each transaction after a transaction has been started between said card-type storage medium and a transaction apparatus accessing said card-type storage medium to execute the transaction therewith by making a security check and after the data file that is an object of an access of said transaction apparatus has been determined;
notifying said transaction apparatus of said unique identifier generated for the transaction; and
comparing an unique identifier given to the access command from said transaction apparatus with said unique identifier generated for said transaction in said card-type storage medium, and performing a process according to the access command from said transaction apparatus if said unique identifiers are in agreement.
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Accused Products
Abstract
In a card-type storage medium and transaction apparatus, when a transaction is started between the card-type storage medium and the transaction apparatus and a data file that is an object of an access from the transaction apparatus is determined, a unique identifier generating device of the card-type storage medium generates a unique identifier for this transaction. A unique identifier notifying device notifies the unique identifier to the transaction apparatus. Accordingly, it is possible to specify the transaction apparatus having access to the card-type storage medium by referring to that unique identifier.
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Citations
34 Claims
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1. A method for managing security of a card-type storage medium having a storage unit keeping a data file therein comprising the steps of:
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generating an unique identifier in said card-type storage medium for each transaction after a transaction has been started between said card-type storage medium and a transaction apparatus accessing said card-type storage medium to execute the transaction therewith by making a security check and after the data file that is an object of an access of said transaction apparatus has been determined; notifying said transaction apparatus of said unique identifier generated for the transaction; and comparing an unique identifier given to the access command from said transaction apparatus with said unique identifier generated for said transaction in said card-type storage medium, and performing a process according to the access command from said transaction apparatus if said unique identifiers are in agreement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a card-type storage medium having a storage unit having a data area keeping a data file therein and a directory area keeping control information about the data file in said data area therein and a control unit managing the data file in said data area in said storage unit on the basis of the control information in said directory area in said storage unit, the improvement comprising:
said control unit comprising; a unique identifier generating means for generating a unique identifier for each transaction after a transaction has been started with an external apparatus by making a security check and after the data file that is an object of an access from said external apparatus has been determined; a unique identifier notifying means for notifying the unique identifier, generated for the transaction by said unique identifier generating means, to said external apparatus; a first comparing means for comparing a unique identifier given to an access command from said external apparatus with the unique identifier generated for the transaction by said unique identifier generating means; and a first judging means for determining that the access command from said external apparatus is for said transaction if the unique identifiers are in agreement as a result of comparison by said first comparing means and for performing a process according to the access command from said external apparatus. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A transaction apparatus for a card-type storage medium which accesses said card-type storage medium having a storage unit keeping a data file therein to execute a transaction therewith, comprising:
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a notifying means for notifying said card-type storage medium of an access command which is given a unique identifier until an end of a transaction, notification being after the data file that is an object of the access in said card-type storage medium has been determined and said transaction apparatus has been informed of said unique identifier by said card type storage medium, said unique identifier generated for each transaction in said card-type storage medium; and a deciphering means deciphering a ciphertext of the unique identifier with a first encipherment key if the unique identifier from said card-type storage medium is enciphered with said first encipherment key. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A transaction apparatus for a card-type storage medium which accesses said card-type storage medium having a storage unit keeping a data file therein to execute a transaction therewith, comprising:
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a notifying means for notifying said card-type storage medium of an access command which is given a unique identifier until an end of a transaction, notification being after the data file that is an object of the access in said card-type storage medium has been determined and said transaction apparatus has been informed of said unique identifier by said card type storage medium, said unique identifier generated for each transaction in said card-type storage medium; and an enciphering means for enciphering the unique identifier from said card-type storage medium with an encipherment key, and said notifying means giving a ciphertext of the unique identifier obtained in encipherment by said enciphering means to the access command and notifying it to said card-type storage medium. - View Dependent Claims (34)
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Specification